题干
The volunteers a lot of help to the community for nearly ten years.
A：offered
B：are offering
C：will offer
D：have offered
答案(点此获取答案解析）
D
The volunteers a lot of help to the community for nearly ten years.
A：offered
B：are offering
C：will offer
D：have offered
下列有关此表达式的叙述，不正确的是（ ）